A Day To Remember. I don't know if you know of them. The first impression of them is whiney-emo-indie-shite but if you listen to the latest album Homesick, it has some fucking AWESOME breakdowns in.
On top of that, I absolutely recommend seeing them live. Not only are they DAMN good (vocalist struggles to keep up with himself, but w/e) but the crowd is full of jailbait which is always nice xD